Operating instructions
Gateway ZAbluegalaxy / DIG-2019NE
•
Installation
L-BAL-312-GB 2020 Index 001
13/23
2.2.5
Ethernet Interface
Ethernet interfaces of the Raspberry PI. The Ethernet physics is 10/100BaseT, available through the
shielded modular jack. A twisted pair cable can be used to connect to this port.
The two LEDs indicate Ethernet status as follows:
LED1
LED2
No activity
No Link
Activity
10/100 MBit Link
NOTICE
If your Ethernet cable is long (normative limit = 30 m) or leaves a building, then an
additional protection against surges is required.
Add an external surge protector is such cases. E.g. ground the Ethernet cable shield
where it enters the building or your cabinet.
If you just connect to a nearby switch, such countermeasures are not required.
2.2.6
USB host interfaces (USB1-USB4)
Two USB interfaces are available at the connector panel.
1 +5V, I
MAX
= 500 mA, 500 mA for all ports
2 USB-
3 USB+
4 GND
Table 5: USB host connector
NOTICE
Although each port can deliver supply current of 500 mA, the overall load on USB1 to
USB4 interfaces must be limited to 500 mA to prevent power supply from overheating
and the +5V internal fuse from triggering.
If you draw excessive power from USB ports or short circuit USB power supply outputs,
then the Raspberry PI board will temporarily shut off the USB power supply and retry
every 2 seconds.
1 RD+
5 n.c.
2 RD-
6 TD-
3 TD+
7 n.c.
4 n.c.
8 n.c.
Table 4: Ethernet connector
1
